ALl right! Here's my guess! (not including the chia items, because they are still unsearchable... and can't be found on neopets...)
my total for the rarities of ALL chocolate items was 32,012
so multiply that by three to find the calories, and you get 96,036
divide that by 600 calories per day to get the number of days...
that's 160.06, rounded up is 161 days...
I'm not going to put a guess up yet however because the chia items might come up by thursday, in which case they must be added to this total....
but there is my stuff....